Well, it really doesn't matter too much which shaders are on the faces. The vast number of shaders generated by my scripts are simply there for the purposes of projection mapping. Once that is done, you don't need them anymore. What I generally do is assign a completely new shader to the entire shape and just delete all of the now unused colored lamberts. If you need to find out which shader is assigned to a particular face, you can use getMaterial.mel for that.